This page attempts to list all Sony ATRAC chipsets (CXDxxxx) found in decks and units they can be found in. It uses this a-nkmr page as it's main source. Hopefully it expands to cover all chipsets. Potentially useful thread on sonyinsider.
More technical info: https://www.minidisc.org/atrac_versions.html
http://www.puwa-net.com/minidisc/technical/atracchange.htm
https://web.archive.org/web/20010828211157/http://psych.tripod.com/md-tech.html - chart of some chip part#'s
ATRAC version
* 1
* 2
* 3
* 3.5
* 4
* 4.5
* Type-R
* Type-S
Ver. 1.0: CXD2527
MDS-101 (1993): CXD2527R-1
Since significant bitrate capacity was devoted to error control, the sound quality was poor.
Ver. 2.0: CXD2531
Ver. 3.0: CXD2535 / CXD2536
Ver. 3.5: CXD2536
Ver.4.0: CXD2650 / CXD2652
MDS-S37 (1996): CXD2650R
MDS-JE500 (1996): CXD2650R
MDS-JE700 (1996): CXD2650R
MDS-J3000 (1996): CXD2650R
MDS-JE510 (1997): CXD2650R / CXD2652AR
MDS-S38 (1997): CXD2650R / CXD2652AR
MDS-PC1 (1997): CXD2652AR
Ver. 4.5: CXD2537 / CXD2654
MDS-S39 (1998): CXD2654R
MDS-S40 (1999): CXD2654R
CMT-SD1 (1999): CXD2654R
MDS-JE330 (1999): CXD2654R
MDS-JE520 (1998): CXD2654R
MDS-JA30ES (1997): CXD2537R
MDS-JA50ES (1996): CXD2537R
MDS-JB920 (1998): CXD2654R
MDS-W1 (1998): CXD2654R Double Deck
MXD-D2 (1998) CD + MD integrated
MDS-PC2 (1999) : CXD2654R
Type-R: CXD2656 / CXD2656R / CXD2662R
CXD2656 (NON-MDLP)
CXD2656R (MDLP)
CXD2662R (MDLP):
MDS-S50 (2000)
MDS-JE640 (2000)
MDS-JE770 (2001)
MDS-JB940 (2000)
MDS-JA333ES (2000)
MXD-D3 (2000) CD + MD integrated
MXD-D5C (2000) 5 CDs + MD integrated
MXD-D40 (2001) CD + MD integrated
MDS-PC3 (2000)
MDS-NT1 (2001) No input terminal other than USB
LAM-1 (2001) There is no input terminal other than CD + MD integrated USB
LAM-Z1 (2001) CD + MD integrated type (with SP) There is no input terminal other than USB
Type-S: CXD2664R